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app/Models/Ecommerce/Product/Property/Attribute.php

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+<?php
+
+namespace App\Models\Ecommerce\Product\Property;
+
+use App\Models\Ecommerce\Product\Category\Category;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+use Spatie\EloquentSortable\Sortable;
+use Spatie\EloquentSortable\SortableTrait;
+use Spatie\Sluggable\HasSlug;
+use Spatie\Sluggable\SlugOptions;
+use Spatie\Translatable\HasTranslations;
+
+class Attribute extends Model implements Sortable
+{
+    use HasFactory;
+    use HasSlug;
+    use HasTranslations;
+    use SortableTrait;
+
+    /**
+     * The attributes that are mass assignable.
+     */
+    protected $fillable = [
+        'name',
+        'slug',
+        'description',
+        'type',
+        'is_visible',
+        'is_required',
+        'is_searchable',
+        'is_filterable',
+        'sort_order',
+    ];
+
+    /**
+     * Translatable fields
+     *
+     * @var array<string>
+     */
+    public $translatable = ['name', 'description'];
+
+    /**
+     * Translatable fields
+     *
+     * @var array<string, mixed>
+     */
+    public $sortable = [
+        'order_column_name' => 'sort_order',
+        'sort_when_creating' => true,
+    ];
+
+    /**
+     * Get the options for generating the slug.
+     */
+    public function getSlugOptions(): SlugOptions
+    {
+        return SlugOptions::create()
+            ->generateSlugsFrom('name')
+            ->saveSlugsTo('slug');
+    }
+
+    /**
+     * Attribute values (color: red, black, ...)
+     */
+    public function values(): HasMany
+    {
+        return $this->hasMany(AttributeValue::class);
+    }
+
+    /**
+     * Attribute Category
+     */
+    public function category(): BelongsTo
+    {
+        return $this->belongsTo(Category::class);
+    }
+
+    /**
+     * Attributes categories as belongs-to-many
+     */
+    public function categories(): BelongsToMany
+    {
+        return $this->belongsToMany(Category::class);
+    }
+
+    /**
+     * Return available fields types.
+     *
+     * @return array<string, string>
+     */
+    public static function typesFields(): array
+    {
+        return [
+            'text' => __('Text'),
+            'number' => __('Number'),
+            'select' => __('Select option'),
+        ];
+    }
+}

app/Models/Ecommerce/Product/Property/AttributeValue.php

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+<?php
+
+namespace App\Models\Ecommerce\Product\Property;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Spatie\EloquentSortable\Sortable;
+use Spatie\EloquentSortable\SortableTrait;
+use Spatie\Sluggable\HasSlug;
+use Spatie\Sluggable\SlugOptions;
+use Spatie\Translatable\HasTranslations;
+
+class AttributeValue extends Model implements Sortable
+{
+    use HasFactory;
+    use HasSlug;
+    use HasTranslations;
+    use SortableTrait;
+
+    /**
+     * The attributes that are mass assignable.
+     */
+    protected $fillable = [
+        'value',
+        'key',
+        'attribute_id',
+    ];
+
+    /**
+     * Translatable fields
+     *
+     * @var array<string>
+     */
+    public $translatable = ['value'];
+
+    /**
+     * Translatable fields
+     *
+     * @var array<string, mixed>
+     */
+    public $sortable = [
+        'order_column_name' => 'sort_order',
+        'sort_when_creating' => true,
+    ];
+
+    /**
+     * Get the options for generating the slug.
+     */
+    public function getSlugOptions(): SlugOptions
+    {
+        return SlugOptions::create()
+            ->generateSlugsFrom('name')
+            ->usingSeparator('_')
+            ->saveSlugsTo('key');
+    }
+
+    /**
+     * Attribute
+     */
+    public function attribute(): BelongsTo
+    {
+        return $this->belongsTo(Attribute::class, 'attribute_id');
+    }
+}

app/Models/Ecommerce/Product/Property/ProductAttributeValue.php

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+<?php
+
+namespace App\Models\Ecommerce\Product\Property;
+
+use Illuminate\Database\Eloquent\Casts\Attribute;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class ProductAttributeValue extends Model
+{
+    use HasFactory;
+
+    /**
+     * Table name
+     */
+    protected $table = 'attribute_value_product_attribute';
+
+    /**
+     * Indicates if the model should be timestamped.
+     */
+    public $timestamps = false;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<string>
+     */
+    protected $fillable = [
+        'product_attribute_id',
+        'attribute_value_id',
+        'product_custom_value',
+    ];
+
+    /**
+     * The relations to eager load on every query.
+     */
+    protected $with = ['value'];
+
+    /**
+     * The accessors to append to the model's array form.
+     */
+    protected $appends = ['real_value'];
+
+    /**
+     * Return exact product attribute value.
+     *
+     * @return string|int
+     */
+    public function realValue(): Attribute
+    {
+        return Attribute::make(
+            get: fn () => $this->product_custom_value ?: ($this->value?->value ?? '')
+        );
+    }
+
+    /**
+     * Attribute Value for forms
+     */
+    public function valueForForms(): null|int|string
+    {
+        return $this->product_custom_value ?: $this->attribute_value_id;
+    }
+
+    /**
+     * Value
+     */
+    public function value(): BelongsTo
+    {
+        return $this->belongsTo(AttributeValue::class, 'attribute_value_id');
+    }
+}

app/Models/Ecommerce/Product/Property/ProductProperty.php

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+<?php
+
+namespace App\Models\Ecommerce\Product\Property;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class ProductProperty extends Model
+{
+    use HasFactory;
+
+    /**
+     * The table associated with the model.
+     *
+     * @var string
+     */
+    protected $table = 'product_attributes';
+
+    /**
+     * Indicates if the model should be timestamped.
+     */
+    public $timestamps = false;
+
+    /**
+     * The attributes that are mass assignable.
+     */
+    protected $fillable = [
+        'product_id',
+        'attribute_id',
+    ];
+
+    /**
+     * The relations to eager load on every query.
+     */
+    protected $with = [
+        'attribute',
+        'values',
+    ];
+
+    /**
+     * Attribute
+     */
+    public function attribute(): BelongsTo
+    {
+        return $this->belongsTo(Attribute::class, 'attribute_id');
+    }
+
+    /**
+     * Product
+     */
+    public function product(): BelongsTo
+    {
+        return $this->belongsTo(Product::class, 'product_id');
+    }
+
+    /**
+     * Property values
+     */
+    public function values(): HasMany
+    {
+        return $this->hasMany(ProductAttributeValue::class, 'product_attribute_id');
+    }
+}